StarTech.com 41U Rack Enclosure Server Cabinet - 27.6 in. Deep - Built-in Fans Fans draw fresh air through the rear filter to protect your equipment in an enclosed environment Plexiglass door lets you see the equipment status, while keeping your equipment secure Includes casters, stabilizers and everything you need to get started right away Extruded aluminum construction provides rounded corners and edges for an attractive appearance Fully forward/back adjustable mounting rails inside cabinet Front and back doors are removable and can be switched to open left or right Rolling casters provide full mobility Three (3) roof-mounted fans exhaust up to 300 CFM of air